/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package studio.raptor.ddal.benchmark;

import com.google.common.base.Joiner;
import com.google.common.base.Throwables;

import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.util.Map;

import static java.util.Objects.requireNonNull;

public class SimpleLineBenchmarkResultWriter implements BenchmarkResultHook {
  private final Writer writer;

  SimpleLineBenchmarkResultWriter(OutputStream outputStream) {
    writer = new OutputStreamWriter(requireNonNull(outputStream, "outputStream is null"));
  }

  @Override
  public BenchmarkResultHook addResults(Map<String, Long> results) {
    requireNonNull(results, "results is null");
    try {
      Joiner.on(",").withKeyValueSeparator(":").appendTo(writer, results);
      writer.write('\n');
      writer.flush();
    } catch (IOException e) {
      Throwables.propagate(e);
    }
    return this;
  }

  @Override
  public void finished() {
    // No-op
  }
}
